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    function fn(url){
        var arr = url.split('&')
        var obj = {}
        for (let i = 0; i < arr.length; i++) {
            var arr1 = arr[i].split('=')
            obj[arr1[0]]=arr[1]
            
        }
        return obj
    }
    var str = 'admin=user&pass=1234&sex=女'
    console.log(fn(str));
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